Optical module

Abstract

An optical module includes a substrate and terminals. The substrate has: a first planar part having first through holes into which the terminals are inserted respectively; a second planar part that opposes the first planar part as a result of the substrate being folded and has second through holes into which the terminals are inserted respectively; at least one first land part that is formed on the first planar part around at least one of the first through holes and that is connected to at least one of the terminals inserted through the first through hole; and at least one second land part that is formed on the second planar part around at least one of the second through holes into which another one of the terminals not being connected to the first land part is inserted and that is connected to the terminal inserted through the second through hole.

What is claimed is: 
     
       1. An optical module comprising a substrate and a plurality of terminals, wherein
 the substrate includes:
 a first planar part having a plurality of first through holes into which the plurality of terminals are inserted respectively; 
 a second planar part that opposes the first planar part as a result of the substrate being folded and that has, on positions opposing the plurality of first through holes as the result of the substrate being folded, a plurality of second through holes into which the plurality of terminals inserted into the plurality of first through holes respectively are inserted respectively; 
 a first land part that is formed on the first planar part around at least one of the plurality of first through holes and that is connected to at least one of the plurality of terminals inserted into the at least one of the plurality of first through holes; and 
 a second land part that is formed on the second planar part around at least one of the plurality of second through holes into which another one of the plurality of terminals not being connected to the first land part is inserted and that is connected to the other one of the plurality of terminals inserted into the at least one of the plurality of second through holes. 
 
 
     
     
       2. The optical module according to  claim 1 , further comprising a spacer interposed between the first planar part and the second planar part, with the second planar part opposed to the first planar part as a result of the substrate being folded. 
     
     
       3. The optical module according to  claim 1 , wherein the substrate further includes a wiring that extends from the second land part and is formed so as to detour a terminal that is arranged in an outermost position from among the plurality of terminals respectively inserted into the plurality of first through holes. 
     
     
       4. The optical module according to  claim 3 , wherein the wiring is formed so as to run on a front surface and a rear surface of the substrate alternately. 
     
     
       5. The optical module according to  claim 4 , comprising a plurality of the wirings, wherein only wirings that are not positioned adjacent to each other from among the plurality of the wirings are formed from the rear surface of the substrate. 
     
     
       6. The optical module according to  claim 1 , wherein the at least one of the plurality of first through holes has a smaller diameter than another first through hole other than the at least one of the plurality of first through holes, and
 the at least one of the plurality of second through holes has a smaller diameter than another second through hole other than the at least one of the plurality of second through holes. 
 
     
     
       7. The optical module according to  claim 1 , wherein a folded section of the substrate has at least one cut-out part. 
     
     
       8. The optical module according to  claim 1 , wherein
 the plurality of terminals are arranged in N rows, where N is an integer of 2 or larger, 
 the plurality of first through holes are arranged in the first planar part in N rows, the plurality of terminals arranged in N rows being inserted into the plurality of first through holes, 
 the plurality of second through holes are arranged in the second planar part in N rows, the plurality of terminals arranged in N rows being inserted into the plurality of second through holes with the second planar part opposed to the first planar part as a result of the substrate being folded, 
 the first land part is connected to the at least one of the plurality of terminals which is, among the plurality of terminals arranged in N rows, inserted into the at least one of the first through holes, and 
 the second land part is connected to the other one of the plurality of terminals which is, among the plurality of terminals arranged in N rows, inserted into the at least one of the second through holes. 
 
     
     
       9. The optical module according to  claim 1 , wherein
 the substrate is folded M times, where M is an integer of 2 or larger, and 
 the substrate further includes:
 an (M+1)th planar part that opposes a planar part positioned underneath thereof as a result of the substrate being folded for an M'th time and that has a plurality of (M+1)th through holes into which the plurality of terminals are inserted respectively; and 
 an (M+1)th land part that is formed on the (M+1)th planar part around at least one of the plurality of (M+1)th through holes into which another one of the plurality of terminals not being connected to any land parts formed on the planar part is inserted, the (M+1)th land part being connected to the other one of the plurality of terminals inserted into the at least one of the plurality of (M+1)th through holes.